| 摘要 |
PROBLEM TO BE SOLVED: To impart an excellent sliding prevention property without damaging the superior waterproofness of a permeable waterproof sheet, nail-hole cutoff properties and vapor permeability. SOLUTION: A roof backing material has the permeable waterproof sheet having nail-hole cutoff properties, a nonwoven fabric, in which a nonslip function is given to a surface and which has a friction coefficient on the surface of 0.4 or more and a water repellency of 2 or less, and an adhesive layer for unifying and compounding these permeable waterproof sheet and nonwoven fabric between the permeable waterproof sheet and the nonwoven fabric. Vapor permeability is set to 1,000 g/m<SP>2</SP>/24 hr or more. COPYRIGHT: (C)2004,JPO
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